关键词: 结肠镜, 息肉切除术, 出血, 电凝综合征, 穿孔, 并发症

Abstract: For children suspected with lower gastrointestinal bleeding caused by colorectal polyps，using a colonoscopy to diagnose and treat has become very important. The main complications after polypectomy under colonoscope are bleeding，coagulation syndrome，and perforation. Compared with adults，children have a thin intestinal muscle layer，tender mucosa，and poor intestinal barrier function，but have fewer comorbidities and less use of anticoagulants. These characteristics determine the different risks and incidences of complications of post-polypectomy between children and adults. Pediatric endoscopists should take appropriate measures to prevent related complications according to the characteristics of children's polyps. This article will describe the risk factors，prevention，and management of bleeding，coagulation syndrome，and perforation after polypectomy in  children.

Key words: colonoscopy, polypectomy, post-polypectomy bleeding, post-polypectomy coagulation syndrome, perfora-tion, complication